Re-appearance of the SARS-CoV-2 virus nucleic acid in patients recovering from COVID-19

Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, Xuzhou 221004, China; Department of Bioinformatics, School of Medical Informatics and Engineering, Xuzhou Medical University, Xuzhou 221004, China; Department of Infectious Disease, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221004, China; Institute of Digestive Diseases, Xuzhou Medical University, Xuzhou 221004, China; Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China; Medical Technology School of Xuzhou Medical University, Xuzhou Key Laboratory of Laboratory Diagnostics, Xuzhou 221004, China; Department of Laboratory Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China These authors contributed equally to this work. Correspondence to: Bing Gu. Prof., Department of Laboratory Medicine, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China. Email: binggu2015@xzhmu.edu.cn; Renhao Wang. Prof., Department of General Surgery, The Affiliated Hospital of Xuzhou Medical University, Xuzhou 221006, China. Email: wangrenhao@xzhmu.edu.cn. Provenance and Peer Review: This article was not commissioned. The article was sent for external peer review.